Cheap coins will never help you to grow in trading or long term investment. Always you need to have some USD coins, tops cryptos and few cheap coins these all together may allow you to stabilize when the market fluctuate here and there.
Unless he is willing to invest longer time well there are possibilities of gaining even having small investments because this is the only thing that he can gain or else the coin of investing will be used by whales to pump and dump.
We have seen many times like this that a cheap coins (shitcoins)has been pumped and had huge value in just a couple of hours and them dumped again